APPENDIX A:
SUBCOHORT FOR FACILITY COMPARISON ANALYSIS


Entry in follow-up for the preliminary SMR analysis was 30 days after first hire by an Oak Ridge facility. However, for all analyses except the preliminary SMR analysis the covariable length of employment was included and had two levels: one year or less and greater than one year. There were many short term workers, and it was desirable to limit the number of time-dependent variables whenever reasonable to make efficient use of computer resources. Therefore, for the facility comparison analyses, which included the four race/gender groups, a worker was entered into follow-up 365 days after first hire. Any workers who died or were lost to follow-up during the year after first hire were excluded from the subcohort for facility comparison analyses. Table A1 summarizes the number of individuals, deaths, and person-years lost by imposing a 365 day entry criterion on the cohort analysis. The remaining tables in this section provide information about this subcohort by race/gender group.

Table A1
Impact of 365 Day Entry to Follow-Up
  Entry Hire + 30 Days Entry Hire + 365 Days
Total Number Total Deaths Total Cancer Deaths Total Person-Years Total Number Total Deaths Total Cancer Deaths Total Person-Years
White males 68,666 22,724 4,679 1,824,000 67,197 22,590 4,673 1,761,950
White females 29,791 3,595 1,124 833,100 27,377 3,581 1,124 832,350
Nonwhite males 4,233 1,121 202 82,700 3,909 1,106 201 82,600
Nonwhite females 3,311 542 109 70,400 2,826 542 109 70,250

Table A2
Distribution of Covariables by Race/Gender Groups
  (67,197)
White Males		 (3,909)
Nonwhite Males		 (27,377)
White Females		 (2,826)
Nonwhite Females
Birth cohort
Number of workers (% of race/gender group)
before 1/1/1900 5,859 (8.7) 233 (6.0) 511 (1.9) 92 (3.3)

1/1/1900-12/31/1909

 10,194 (15.2) 338 (8.6) 2,157 (7.9) 302(10.7)

1/1/1910-12/31/1919

 17,086 (25.4) 673 (17.2) 5,976 (21.8) 613 (21.7)

1/1/1920-12/31/1929

 17,120 (25.5) 874 (22.4) 12,906 (47.1) 785 (27.8)

1/1/1930+

 16,938 (25.2) 1,791 (45.8) 5,827 (21.3) 1,034 (36.6)
Length of Employment
Number of Workers (% of race/gender group)
<1 year 23,880 (35.5) 1,632 (41.7) 11,928 (43.6) 1,460 (51.7)
1 year + 43,317 (64.5) 2,277 (58.3) 15,449 (56.5) 1,366 (48.3)
Paycode
Number of workers (% of race/gender group)
Monthly 10,023 (15.0) 358 (9.2) 751 (2.8) 63 (2.2)
Nonmonthly 57,174 (85.0) 3,551 (90.8) 26,626 (97.2) 2,763 (97.8)

Table A3
Average Years of Employment and Follow-Up by Race/Gender Groups
  (67,197)
White Males		 (3,909)
Nonwhite Males		 (27,377)
White Females		 (2,826)
Nonwhite Females
Years of Employment
Mean 6.9 5.9 3.3 3.3
Median 1.9 1.8 1.2 0.9
Years of Follow-Up
Mean 26.2 20.2 24.5 23.9
Median 29.4 16.2 37.9 27.1

Table A4
Paycode by Facility of First Hire (White Males)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Nonmonthly 20,041 21,497 9,018 6,618 57,174
(85.08%)
Monthly 446 2,705 1,127 5,745 10,023
(14.92%)
Total 20,487
(30.49%)		 24,202
(36.02%)		 10,145
(15.10%)		 12,363
(18.40%)		 67,197
(100.00%)

Table A5
Length of Employment by Facility of First Hire (White Males)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Greater than 1 year 9,286 9,662 1,173 3,759 23,880
(35.54%)
1 year or less 11,201 14,540 8,972 8,604 43,317
(64.46%)
Total 20,487
(30.49%)		 24,202
(36.02%)		 10,145
(15.10%)		 12,363
(18.40%)		 67,197
(100.00%)

Table A6
Paycode by Facility of First Hire (Nonwhite Males)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Nonmonthly 1,080 982 707 782 3,551
(90.84%)
Monthly 0 49 29 280 358
(9.16%)
Total 1,080
(27.63%)		 1,031
(26.38%)		 736
(18.83%)		 1,062
(27.17%)		 3,909
(100.00%)

Table A7
Length of Employment by Facility of First Hire (Nonwhite Males)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Greater than 1 year 715 408 99 410 1,632
(41.75%)
1 year or less 365 623 637 652 2,277
(58.25%)
Total 1,080
(27.63%)		 1,031
(26,38%)		 736
(18.83%)		 1,062
(27.17%)		 3,909
(100.00%)

Table A8
Paycode by Facility of First Hire (White Females)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Nonmonthly 14,605 6,809 1,674 3,538 26,626
(97.26%)
Monthly 8 159 60 524 751
(2.74%)
Total 14,613
(53.38%)		 6,968
(25.45%)		 1,734
(6.33%)		 4,062
(14.84%)		 27,377
(100.00%)

Table A9
Length of Employment by Facility of First Hire (White Females)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Greater than 1 year 7,542 3,021 251 1,114 11,928
(43.57%)
1 year or less 7,071 3,947 1,483 2,948 15,449
(56.43%)
Total 14,613
(53.38%)		 6,968
(25.45%)		 1,734
(6.33%)		 4,062
(14.84%)		 27,377
(100.00%)

Table A10
Paycode by Facility of First Hire (Nonwhite Females)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Nonmonthly 1,469 535 313 446 2,763
(97.77%)
Monthly 0 19 8 36 63
(2.23%)
Total 1,469
(51.98%)		 554
(19.60%)		 321
(11.36%)		 482
(17.06%)		 2,826
(100.00%)

Table A11
Length of Employment by Facility of First Hire (Nonwhite Females)
Frequency
(Percent)		 TEC K-25 Y-12 ORNL Total
Greater than 1 year 977 199 90 194 1,460
(51.66%)
1 year or less 492 355 231 288 1,366
(48.34%)
Total 1,469
(51.98%)		 554
(19.60%)		 321
(11.36%)		 482
(17.06%)		 2,826
(100.00%)

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